Multi-function radio-frequency device, computer system and method of operating multi-function radio-frequency device

A computer system, comprising:

• a multi-function Radio-Frequency device comprising:
• a substrate including a first surface and a second surface opposite to each other;
• a touchpad area disposed on the first surface of the substrate for generating a touch signal according to a touch situation touched on the touchpad area by a user;
• an antenna disposed on the first surface and/or the second surface of the substrate for receiving and transmitting a Radio-Frequency signal, comprising:
• a feed-in terminal for feeding a Radio-Frequency signal;
• a radiator electrically connected to the feed-in terminal for radiating the Radio-Frequency signal;
• and
• a ground electrically connected to the radiator for providing ground;
• and
• a control module disposed on the second surface of the substrate and coupled to the touchpad area and the antenna for generating a touch control signal according to the touch signal and generating an identification signal according to the Radio-Frequency signal to the computer system;
• and
• a central processor coupled to the multi-function Radio-Frequency device for processing the touch control signal and the identification signal.